Aquarell edge study: draw three stones with hard, soft and lost edges

Edges describe how forms meet. An overlapping foreground stone usually has a clear boundary; rounded light-to-dark turns can soften; a shadow near background value may lose part of its outline. Use values and brush marks, not outlines around every stone, for these three edge types.

Assign different roles to three stones

Create a 1600×1000 horizontal canvas with warm gray. Arrange a large left stone about 550 wide, small forward centre stone about 280 and long rear-right stone about 650. Keep bases staggered, establishing depth through overlap immediately.

Sketch simple polygons separately, postponing cracks. Limit colours to light, medium and dark gray plus a little warm gray. Paint on a new layer with a separate background; individual stone layers help reordering without requiring complex groups.

Preserve large planes while colouring

Choose a controllable brush around 80 pixels at 100% opacity. Paint the large stone medium gray, rear stone lighter and small stone darker. Start with clear blocks rather than material texture. Upper-left light gives each an upward light plane and shadow plane, using at most three values.

A light plane need not be a triangle: a rounded patch or angled strip can suit different stones. Related hue values are easier to compare. Hide the sketch and confirm all three shapes and positions remain readable; dependence on outlines suggests unclear adjacent values.

Make hard edges at overlaps

The centre stone overlapping the large one is the clearest edge. Refine its upper boundary once with a 15–25 pixel brush, without a full black outline. A small darker rear shadow can clarify depth, strongest at contact and fading away.

Choose only two or three strong edges: centre-stone contact, large stone’s upper-left turn and long stone’s front. Other edges need less precision. Equally sharp notches make attention jump around the contour instead of sensing weight and space.

Create soft edges with intermediate colours

A rounded light–shadow boundary needs no blur tool. Choose intermediate gray, a broader brush and about 25% to 40% opacity for one or two short passes. Keep a 40–70 pixel transition following the surface turn, preserving both original planes. Low opacity is not permission for endless rubbing that removes values.

A soft-tipped brush needs fewer strokes; a hard tip can use two or three intermediate values. Both are manual control, not promised physical-paint diffusion. For opacity buildup, also read Brush size and opacity for comparison exercises.

Leave a short unseen outline

Bring the large stone’s lower-right shadow near background value so a short contour blends in. “Lost” means reduced neighbouring-colour contrast, not erasing a hole. Keep clearer endpoints so viewers complete the shape. Begin with only one-tenth to one-fifth of the outline.

Retain ground-contact shadows: short flattened dark-gray shapes, deepest only near contact and fading outward. They ground stones even where outlines merge into the background. A separate shadow layer allows opacity comparison; see Layer-opacity tutorial.

Judge edges before adding cracks

Zoom out: clear edges should focus on the front stone, soft ones describe rounded turns and lost ones remain implied by the whole. Only then add one or two short cracks, weaker than the deepest contact shadow and not crossing every light plane like written lines.

Why do soft edges look muddy? Muddy soft edges often come from mixing hues repeatedly or making transitions too broad. Restore the two main light/dark planes, then connect with one intermediate colour. The goal is a gradual turn, not uniformly blended gray.

Does a lost edge make part of the stone disappear? Losing the entire outline can obscure form. Shorten the lost section, preserve contrast at its endpoints and strengthen contact shadow. A short weak edge supports nearby hard edges better than uniform blur everywhere.

Hide sketch and swatch layers before export and inspect at normal size. Next time retain positions and change light direction to compare redistributed hard, soft and lost edges instead of adding texture to conceal uncertain decisions.

Inspect negative space among the stones: narrow gaps crowd depth relationships. Make one wider dark gap and another short contact edge for clearer layering. Adjust gaps before adding cracks.

Sources and applicable version

References Aquarell official description Based on public brush, colour and layer capabilities, checked against version 1.0.5 on October 23, 2026. Methods and sizes are manual suggestions; interfaces may change, and no automatic material or depth-of-field effect is assumed.